Because they resemble the identification tags found on dog collars, those worn by military personnel have also come to be known as dog tags. Now popular among civilians as fashion accessories, the tags are officially intended to aid in identifying those killed or wounded in battle. Before dog tags were invented, soldiers were known to scratch their names on the backs of their belt buckles or pin notes with identifying information to their clothing. Why are dog tags usually issued in sets of two?
Ralph Waldo Emerson
Back in the day
A supernova is a rare celestial phenomenon involving the explosion of a star, resulting in an extremely bright, short-lived object that emits vast amounts of energy. The last supernova to be observed in the Milky Way was seen in 1604 by Johannes Kepler and was used by Galileo, at his trial, as evidence against the presupposition that the universe never changes. Visible to the naked eye, it was brighter at its peak than any other star in the night sky. How far from Earth was this supernova?
Born on a day like today
Del Toro is an Academy Award-nominated Mexican filmmaker whose films often explore the darker elements of fantasy and reflect his fascination with "insects, clockwork, monsters, dark places, and unborn things." His most acclaimed films to date, Pan's Labyrinth and The Devil's Backbone, both feature children living under authoritarian rule while facing frightening supernatural entities and have been compared with what film, considered to be the finest Spanish film of the 1970s?